7 MPEG-4 video codecs compared

[joepic]

MPEG-4 is one of the technologies that is likely to play an important role in the near future. The best known MPEG-4 technology is currently DivX, a video codec that compressed audio and video while remaing almost DVD quality. TechIMO.com has done a comparisation of several other MPEG-4 video codes, they tested DivX, XviD, Microsoft, 3ivx D4, DICAS MPEGable, RealMagic and On2. Also H.264 is included in the test. In the test one source movie has been compressed with the different codes and also different settings are tried.

Part of conclusion:

Analysis of compression quality and efficiency is a subjective process. What appears acceptable to one person may not to another. From the graphics presented, it appears that XviD 2-pass is probably the best solution in extremely high bitrate situations. DivX 5 Professional one-pass fairs slightly better than XviD for mid-range bitrates.

REALmagic offered the best overall encoding frames per second performance during testing, but this format fails to deliver acceptable image quality at low bitrates due to extensive macroblocking. On2 VP3 provides great quality for extremely low bitrates, though this is not a MPEG-4 codec. It appears this proprietary format scales better at low bitrates, while MPEG-4 rapidly taking over for image quality once bandwidth reaches 1000+ Kbps ranges. Due to the nature of its format VP3 tends to blur images as data rates fall instead of creating macroblock artifacts like MPEG-4.


If you would like to learn more about MPEG-4 then read here. http://www.techimo.com/articles/index.pl?photo=33&SID=12&tag=SNnb323

[Gazorgan]

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[Mirror_Image]

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